Elevating scraper



Aug. 7, 1945. s. w. MORK ELEVATING SCRAPER 2 Sheets-Sheet 1 Filed Feb.12, 1944 IN VEN TOR.

AHURNFIS.

s- 1945- G. w. MORK 2,380,986

ELEVATING SCRAPER Filed Feb. 12, 1944 2 Sheets-Sheet 2 J a J9 47;. O I o4 8 JO- 0 40 o 49 BY26 W AJTORNHS.

Patented 7 1945 2 2 UNITED"; STAT 1 PATENT lorries 1 assaaae nnrs'iirlsnrms Appli i gm Rois-22.11;! I 7 My invention relates to'new anduseful improvements in elevating scrapers.

The tractor-pulled earth-moving scraper is now well known in the art.Such scrapers have,

for many purposes, replaced the combination of a power-shovel ordrag-line excavator-with a fleet of dump-trucks. x

But, asfthe use ofsuch scrapers has gradually been extended to longerand longer hauls,

-- the inefliciency of using dissins equipment to haul, and haulingequipment to dig, has become the description progresses.

more and more evident; Moretractive force is needed for digging than forhauling, and the use of My invention consists in the novel parts and ain the combination and arrangement thereof, which are defined in theappended claims, and

of which one embodiment is exemplified in theaccompanying drawings,which are hereinafter particularly described and explained.

Throughout the description the same reference number is applied to thesame member or to similarjmembers.

Figure 1 is a plan sinsp i r Figure 2 is a side elevation of my scraper,in carrying position.

view of my scraper in dig- Figure 3 is a side elevation of the samescraper,

in digging position.

provement of the traction device'with eitherof The best that has beensuggested in the past Figure 4 is a front elevation of the sa scraper.

Figure 5 is a side elevation of the same scraper, in elevated dumpingposition.

Referring to the figures, we see that the main' frame of my scrapercomprises two side-beams II, a cross-beam l2, a'draft to ue l3, 'four,vertical beams l4, l5, and a top cross beam I6.

The main frame is supported on two wheels to meet this situation hasbeen to use two fraction elements, one pulling and the other pushing thescraper. The pulling element is primarilydesigned for running overroads; .one of these is permanentlyattached-to each scraper, sometimeseven being built-in. The pushing element is primarily designed tosupply. tractive force during digging: one such element usually servingseveral scrapers.

But it will readily be seen, that this espedient.

only partially solves the above-recited problems. Accordingly it is theprincipal object of -my present invention to devise a scraper which canelevate to dump into a truck.

The advantages of digging by scraper can thus be retained. The scraperand its hauling tlRc-fl tor can be built with but one end in view,namely, eflicient digging, rather than as a compromise between diggingand carrying; And the carry- IT, or other equivalent means.

' An auxiliary frame, comprising two sidebeams l8 and a cross-beam I9,is pivoted low down on the main frame on transverse horizontal pivots20.

A second auxiliary frame, comprising two sidebeams' 2|- and a cross-beam22, is pivoted high up on the mainframe 0n transverse horizontal pivots23. d

These tw auxiliary frames together constitute a sort of convergingpantograph linkage for end-gate-is supported on arms 30, and the apronis supported on arms 3i, both sets of arms being pivoted to the sides ofthe bowl 24. As shown,

- both sets of arms are pivoted on one and the The lower auxiliary framel8 supports two rollersu,onwhichresttheforwardendsof the apron-arms 8|.

The operations of my scraper are controlled by two ropes, which areactuated by a two-drum winch (not shown) mounted on and powered by thetractor (not shown) which drags my scraper. Rope It extends from ananchorage II on the end-gate II. thence over sheaves It, ll, 8' and I.on the upper auxiliary frame, and sheaves ll, 4| and 42 on the mainframe, to the winch on the tractor. This rope serves to open and closethe end-gate 28.

Hope It extends from an anchorage ll on the lower auxiliary frame,thence over several sheaves ll on the main frame and sheaves It on theauxiliary frame, thence over sheave 41 on the main frame across theframe and around sheave ll, thence over several sheaves ll and l. onthat side of the scraper, thence back across the main frame via sheavesI! and II, thence around some more sheaves II and 46 on the originalside of the scraper, and thence by sheaves II, 52 and "to the winch onthe tractor. This rope serves to raise and lower the bowl.

However. other means than ropes could be' used.

The operation of my invention is as follows: Starting from the carryingpodtion of Figure 2, if rope ll be paid out, the bowl will descend tothe digging position of Figure 3. The front ends of apron-arms 3|,bearing against rollers,

will open apron 20, so as to permit the dirt, cut by digging-edge 21, toenter bowl 24. Other means for opening the apron could be used.

When the bowl has been filled, the pulling-inofropeflwillraisethebowlfltothecarrying position of Figure 2, and apron2| will close on the load as there shown.

Further pulling-in of rope 43 will raise the bowl 24 to the position ofFigure 5, but with the end-gate 2| still closed, rather than as-shown.

Inasmuch as side-beams ll of the main frame are spaced apart, and as theaxles of wheels I! Endgate II can then be opened, by pulling on rope 84.so as to dump the contents of the bowl in my invention is not to belimited to the specific form or arrangement of parts herein describedand shown, except insofar as'required by limitations in my claims.

. I claim: l

1. In an earth-moving scraper the combination of: a ground support: anearth-holdingbowl, having sides, a bottom. and an earth-cutting edge atthe forward end of the bottom; two sets do not extend across from wheelto wheel, a dump truck can back in underbowl il.

amass of arms to support the bowl on the ground support, said sets beingpivotally attached to the bowl on two respective vertically spacedhorizontal axes, and to the ground support on two respective verticallymore spaced horizontal axes, both of said sets of arms extendingrearwardly from their pivots on the ground support to their pivots onthe bowl whereby said bowl is supv of the bowl; separate operatingmeans, to open the end-gate; and automatic means, to open the apronwhenever the bowl is tilted to digging position, and to permit the apronto close in all other pos tions.

2. A scraper according to claim 1, further characterized by the factthat the ground support is forked rearwardly, so as to permit a truck toback in under the bowl when the latter is raised.

3. 'A scraper according to claim 1, further characterized by the factthat the lower set of arms is upwardly cambered.

4. A scraper according to claim 1, further characterized by the factthat the lower set of arms is upwardly cambered; and that the groundsupport is forked rearwardly, so as to permit a truck to back in underthe bowl when the latter is raised.

5. In an earth-moving scraper, the combination of: a ground support; anearth-holding bowl having an earth-cutting edge at the forward end; twosets of arms to support the bowl on the ground support, said sets beingpivotally attached ,to the bowl on two respective vertically spacedhorizontal axes, and to the ground support on two respective verticallymore spaced horizontal axes, both of said sets of arms extendingrearwardly from their pivots on the ground support to their pivots onthe bowl, whereby said bowl is supported by the ground support fortilting and bodily lifting and lowering; operating means to lift thebowl, from a forwardly inclined dissing po ition, through a.substantially level carrying position, to a rearwardly inclined veryelevated dumping position; an apron to close the front end of the bowl;and means to operate the apron in the digging position.

6. A scraper according to claim 5, further characterized by the factthat the ground supportis forked rearwardly, so as to permit a truck toback in under the bowl when the latter is 7. A scraper according toclaim 5, further charlacierisedbythefactthatthelowersetofarmsisupwardlycambered.

8. A scraper according to claim 5, further characterised by the factthat the lower set of arms is upwardly cambered; and that the groundsupport is'forked rearwardly,.so as to permit a truck to back in underthe bowl when the latter is raised.

GEORGE W. MORK.

